perf(paint): stronger X-ray hit flash + kill spawn/respawn freeze

X-ray hit flash: drive a dedicated flash mode instead of the normal
reveal - pulse off (steady), intensity boost (xrayFlashBoost, default 3x),
snap-on, then restore authored color/pulse exactly. Fixes the weak/dark
flicker where the 0.35s hit window often caught only the pulse's near-off
plateau.

Spawn/respawn freeze: pool GPU RenderTextures across despawn->respawn
(TeardownGpu recycles, CreateRT pops) so a hider->hunter conversion no
longer churns ~70MB of RT alloc/free on every observer; reuse staging
textures to cut per-map GC. Defer the blank base-seed on reveal-gated
remote replicas (DeferInitialSeed) - the real pixels arrive with the
snapshot apply anyway; gate the FurShellRenderer alongside the body so a
deferred replica never shows the pooled RT's stale fur; EnsureBackendSeeded
+ TryCaptureSnapshot guard against capture-before-reseed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/Network/NetworkPlayerSetup.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using Unity.Netcode;
 using UnityEngine;
+using Chameleon.Components;
 
 /// <summary>
 /// Per-avatar network glue on the spawned player. The local owner binds the scene singletons
@@ -102,6 +103,7 @@ public class NetworkPlayerSetup : NetworkBehaviour
     public void MarkConversionSpawn(Vector3 worldPos) => _conversionSpawnPos = worldPos;
 
     private Renderer[] _bodyRenderers; // skinned body mesh(es), toggled by the per-client visibility pass
+    private FurShellRenderer[] _furRenderers; // fur draws via a custom GPU-instanced pass (NOT a Renderer); gated with the body so the avatar reveals atomically and never shows stale pooled fur
     private bool _visibilityApplied;
     private bool _lastVisible = true;
     private bool _renderGate; // conversion: body force-hidden until the fresh hunter has settled into place
@@ -113,6 +115,7 @@ public class NetworkPlayerSetup : NetworkBehaviour
     private PlayerCharacterController _controller; // sibling, cached (the freeze re-asserts per frame)
     private bool _xrayApplied;
     private bool _lastXRay;
+    private bool _lastFlash;
     private bool _frozenApplied;
     private bool _lastFrozen;
     private float _xrayFlashUntil; // Time.time deadline for the just-shot X-ray flash (local per client)
@@ -122,6 +125,7 @@ public class NetworkPlayerSetup : NetworkBehaviour
     {
         _active.Add(this); // scoreboard registry (paired with OnNetworkDespawn)
         _bodyRenderers = GetComponentsInChildren<SkinnedMeshRenderer>(true);
+        _furRenderers = GetComponentsInChildren<FurShellRenderer>(true);
         _painter = GetComponentInChildren<MeshPainter>(true);
         _paintSync = GetComponentInChildren<PlayerPaintSync>(true);
         _concealment = GetComponentInChildren<ConcealmentMeter>(true);
@@ -297,6 +301,12 @@ public class NetworkPlayerSetup : NetworkBehaviour
         if (_bodyRenderers != null)
             foreach (var r in _bodyRenderers)
                 if (r) r.enabled = visible;
+        // Fur is drawn by a custom GPU-instanced pass, NOT a Renderer, so the skinned-mesh toggle above
+        // misses it; gate it too (enabled=false unsubscribes its camera hook), or a deferred/reveal-gated
+        // body would show stale pooled fur strands while its own mesh is hidden.
+        if (_furRenderers != null)
+            foreach (var f in _furRenderers)
+                if (f) f.enabled = visible;
         _lastVisible = visible;
         _visibilityApplied = true;
     }
@@ -353,20 +363,21 @@ public class NetworkPlayerSetup : NetworkBehaviour
     private void UpdateXRayReveal()
     {
         if (!_painter) return;
-        bool reveal = ComputeXRay();
-        if (_xrayApplied && reveal == _lastXRay) return;
-        _painter.XRayRevealed = reveal;
+        // Just-shot flash: a hunter's hit lights this hider up for a brief window (server-broadcast). It drives
+        // a distinct, much stronger flash mode (steady + boosted), so it is tracked apart from the normal reveal.
+        bool flash = Time.time < _xrayFlashUntil;
+        bool reveal = flash || ComputeXRay();
+        if (_xrayApplied && reveal == _lastXRay && flash == _lastFlash) return;
+        _painter.SetXRayReveal(reveal, flash);
         _lastXRay = reveal;
+        _lastFlash = flash;
         _xrayApplied = true;
     }
 
-    // The X-ray reveal predicate for this avatar on the local machine.
+    // The normal (non-flash) X-ray reveal predicate for this avatar on the local machine. The just-shot flash
+    // is OR-combined by the caller so it can select the stronger flash mode.
     private bool ComputeXRay()
     {
-        // Just-shot flash: a hunter's hit lights this hider up for a brief window (server-broadcast), on top
-        // of the normal reveal triggers, so the moment of the hit reads before the hider leaves play.
-        if (Time.time < _xrayFlashUntil) return true;
-
         // Buried-hider reveal: already gated to hider + running match on the owner before it is published.
         if (_embeddedReveal.Value) return true;